Bead-trimming machine.



R. L. TAFT.

BEAU TRIMMING MACHINE.

APPLICATION FILED APR. l4. 19H.

Patented June 25, 1918.

2 SHEETS-SHEET I.

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Inventor:

. iii/[172 Llilf na-V715 W m Arty R. L. TAFT.

BEAD TRIMMING MACHINE.

APPLICATION FILED APR'.14.191I.

Patented Jum 25, 1918.

2 $HEETS-SHEET 2.

nnrrn' snares ranrrr orrrb til RYLAND L. TAFT, F HARTFORD, CONNECTICUT,ASSIGNOR TO THE HARTFORD RUBBER- "WORKS 00., A CORPORATION OFCONNECTICUT.

BEAD-TRIMMING MACHINE.

Specification of Letters ratent. Patented June 25, llwtfi.

Application filed April 14, 1917. Serial No. lfilfififi.

To all whom it may concern:

Be it known that l, RYLAND L. TAFT, a citizen of the United States,residing at Hartford, county of Hartford, State of Connecticut, haveinvented certain new and useful Improvements in Bead-Trimming Ma'-chines, of which the following is a full, clear, andexact description.

This invention relates to machines for trimming the edges of beads usedin pneumatic tires, to free them from a ragged ex cess of material knownas flash which is formed on the edges during melding of the beads.

An object of the invention is to provide a device which will rapidly andquickly remove the hash from a bead, and which can be changed so as toadapt the device for trimming beads of diderent sizes.

With the above object in view the invention consists in the noveldetails of construction and combination of parts hereinafter describedand claimed, it being understood that various modifications may be resorted to within the scope of the appended claims without sacrificingany of the advantages or departing from the spirit of the invention.

The invention can be easily understood from the followingdescriptiontaken in connection yvith the accompanying drawing in which-Figure 1 is a planview of the machine.

Fig. 2 is a side elevation of the machine.

Fig. 3 is a cross-section view of the machine. a

Fig. 4 is a detail view showing a locking device.

Fig. 5 is a detail view of an adjusting device.

Fig. 6 is a detail view of'one of the disk cutters and the disk guide.

Referring now to the drawing 10 designates the frame of the machine ingeneral. Upon a pin 11 at one end of. the frame two straight arms 12 arepivoted, and between these an arm 13, of the irregular shape shown inFig. 2 is also pivoted on the pin. Mounted on the arms 12 are diskcutters 14 which cooperate with a disk shear 15 mounted on the framebelow them. Guide rollers '16 for properly locating the bead 17 withrespect to and directing the bead through the cutting mechanism aremounted on the arm 13, one roller being disposed in advance of thecuttingmechanism and one in rear thereof. The guide rollers coact with adisk guide 18, located between the cutters 14, in positively maintainingthe bead in frictional engagement with the shear 15, which is preferablypower driven ous widths may be trimmed. To accomplish this each cutterisfixedly secured to a hub 20 by means of the bolt 20. The hub iscarried by a shell 21 which is turnably mounted in a housing 22 formedin the corresponding, arm 12. The shell has screw threads 23 on theoutside that engage with corresponding screw threads 24 on the inside ofa strap 25 that fits in a slot inthe housing. By screwing the shells 21into or out of the housings the cutters 14 may be moved toward or awayfrom each other. The cutters may be locked in adjusted position againstlongitudinal movement by tightening thumb screws 26 which cause thestraps to bind upon and clamp the shells against displacement.

In order that the cutters may operate effectively the shear 15 should beof the same width as the space between the cutters. Accordingly theshaft 27 of the shear is equipped with a nut 28 and holders 29 tointerchangeably receive diderent shears corresponding in width to thewidth of the bead to be trimmed.

The disk guide 18, is coaxial with the cutters 1t, and is of the samethickness as the shear 15. The guide is grooved to conform to thecontour of the particular bead to be trimmed, a diderent uide beingprovided for each diderent size or shape of bead. The guide is providedwith an axial opening which receives heads formed on the cutter boltsand projecting axially from the cutters. These heads removably supportthe guide in place, and by means of the heads the guide unites bothcutters 14 for movement as a unit radially relatively to the shear 15,but permits each of the cutters and guide to revolve independently.

The heads 30 moreover are adapted to interchangeably receive the variousguides pro- I vided for beads of difierent sizes.

To promote the most effective working of the machine, the guide rollers16 are grooved to conform to the contour of the particular bead beingtrimmed, a different guide roller being provided for each different sizeor shape of bead. I

For adjusting the cutters and disk guide as a unit radially with respectto the shear the free ends of the arms 12 are supported upon the head ofa T-shaped plate 31 which I is slotted as shown at 32 to receive a boltfit) 33 upon which it is movable up and down on the frame 10, and may belocked in any desired position by tightening the bolt. The weight of thearms 12 and parts carried thereby normally cause them to rest upon thehead of the plate 31. To look the arms against upward displacement fromany adjusted osition, a pair of plugs 34 are slidably tted incorresponding openings formed in the outwardly projecting wall 31 of theframe, and are caused to frictionally bind against the inner faces ofthe arms by means of a. pin 35 having a wedge shaped portion 36 whichfits in wedge shaped recesses-e 37 in the plugs. The pin may be movedoutwardly to set the plugs by means of a nut 38, and upon loosening thenut the pin may be moved inwardly to release the plugs.

In operation the machine is equipped with the guide disk 18, shear 15,and guide rollers 16, of the required size and shape for trimming aparticular size and shape of bead. The cutters 14 are then adjusted toaccurately cooperate with the shear 15. The bead is fedby hand into thereceiving end of the machine through a guide eye 39, then the arm 13 israised to permit the bead being threaded through the groove in the diskguide 18, whereupon the arm is lowered to cause the guide rollers tobend the bead 'over and coact with the guide in forcing the beadfrictionally against the shear so that it will be driven thereby. Themachine 1s now started, the rotating shear causing the bead to be fedprogressively through the machine from which it is directed by adelivery roller 40. During the progress of the bead through the machine,the disk cutter, in conjunction with disk shear, w1ll form a shearingcut simultaneously upon the flash on two edges of the bead and mosteifectivel remove the flash leaving the bead in condition-to besubsequently built into the tire.

Having described my invention, what I claim and desire to protect byLetters Patant-is:

1. In a machine for removing flash from a bead, spaced idler diskcutters, a disk shear coacting with the cutters and having its shearinface extending into the space between t e cutters, a disk guide for thebead disposed between the cutters, means connecting the guide andcuttersfor movement is a unit toward and away from the shear, and means forindependently driving the shear.

2. In a machine for removing flash from a bead, spaced idler diskcutters, a disk shear coacting with the cutters and having its shearingiace extending into the space between the cutters, a disk guide for thebead disposed between the cutters, means detachably connecting thecutters and the guide together, means for moving the guide and thecutters as a unit relatively to the shear, and means for independentlydriving the shear. 3. In a machine for removin flash from a bead, spaceddisk cutters, a disk shear coacting with the cutters, a disk guide forthe bead disposed between the cutters and hav ing an axial opening, andaxial projections on the cutters entering said opening and "connectingthe guide and the cutters for movement as a unit toward and away fromthe shear.

4. In a machine for removing flash from a bead, spaced idler diskcutters, a disk shear coacting with said cutters and having its shearingface extending into the space between the cutters, a disk guide for thebead disposed between the cutters, means for moving the cutters axialltoward and connecting the cutters andthe guide together axially, andmeans for independently driving the shear.

5. In a machine for removing flash from a bead, spaced idler diskcutters, a disk shear coactin with said cutters and having its shearingIace extendin into the space between the cutters, a disi guide ,I forthe bead disposed between the cutters, uide rollers disposed on oppositesides 0 the cutters and coacting with the disk guide in causing the beadto frictionally engage the shear, and means for independently rotatingthe shear to progressively feed the bead.

6.. In a machine for removing flash from a bead, spaced idler diskcutters, a disk shear coacting with the cutters and having its shearingace extendin into the space between the cutters, a dis guide for thebead disposed between the cutters, means for moving the cutters andguide as a unit radially with respect to the shear, means for moving thecutters axially toward and away from each other, and means forindependently driving the shear.

7. In a machine for removing flash from a bead, spaced idler diskcutters, a disk shear coacting with the cutters and having its shearingace extending into the space between the cutters, pivoted arms to whichthe cutters are secured, a guide for the bead disposed between thecutters, means for moving said arms on their pivots to adjust thecutters radially with respect to the inmate shear, means for locking thearms in adusted position, and means for independently driving the shear.

8. In a machine for removing flash from a bead, spaced idler diskcutters, a disk shear coacting with the cutters and having its shearingface extending into the space between the cutters, a disk guide for thebead disposed between the cutters, means for moving the cutters towardor away from each other to adjust them to the various sizes of bead tobe trimmed, means to which said disk uide is secured adapted tointerchangea ly receive various disk guides corresponding to the varioussizes of beads to be trimmed. means to which said shear is securedadapted to interchangeably receive various disk shears corresponding tothe various sizes ofbeads to be trimmed, and means for independentlydriving the shear.

9. In a machine for removing flash from -a bead, spaced idler diskcutters, a disk shear coacting with said cutters and having its shearingface extending into the space between the cutters, spindles to which thecutters areattached, a shell carr ing each spindle and having screwthrea s on the positions, and means for independently driving the shear.

Signed at Hartford, Conn, this 11th day of April, 1917.

RYLAND L. TAFT.

Content of thin: patent may be obtained for ave centa each, byMali-eating the Gemaeloner 0t Wateata,

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